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天然气水合物微观模式及其速度参数估算方法研究 被引量:24

MICROMODELS OF GAS HYDRATE AND THEIR VELOCITY ESTIMATION METHODS
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摘要 天然气水合物沉积介质速度的估算是水合物人工地震探测理论方法和技术研究的组成部分。文中针对水合物在介质孔隙中悬浮、颗粒接触和胶结 3种微观模式 ,对前人估算其速度的多种方法进行了分析研究 ,结合试算模型 ,重点考查时间平均方程、伍德方程、李权重方程和等效介质等方法估算速度的适用性和使用条件。研究结果表明 ,每种方法都有其适用和不适用 (或不太适用 )的条件 ,水合物悬浮模式、颗粒接触模式和胶结模式 ,最为适宜使用的速度估算方法分别是伍德方程、权重方程和时间平均方程。权重方程在合理调整权重参数时有较宽的适用性。 The estimation of gas hydrate sediment velocity is an important component of the seismic methods and technical research on hydrate. There are three kinds of micromodel for hydrate in media pore: suspending, grain contact and cementation. With experimental models, several methods of velocity estimation are studied. The applicability and condition of application of those methods, especially the Time average Equation, Wood Equation, Lee Weight Equation and equivalent media are emphasized. The results demonstrate that there is a condition of application for every method, and the most applicable methods for suspending model, grain contact model and cementation model are Wood Equation, Lee Weight Equation and Time average Equation, respectively. Lee Weight Equation is more applicable by reasonably adjusting the weight factor.
出处 《地学前缘》 EI CAS CSCD 2003年第1期191-198,共8页 Earth Science Frontiers
基金 国家 973项目 (G2 0 0 0 0 4670 5 ) 国家 863项目( 2 0 0 1AA6110 2 0 / 0 2 ) 同济大学海洋地质地球物理国家教育部重点实验室承担的国家 863计划"海洋领域水合物地震属性识别技术"项目 国家自然科学基金项目 ( 4 99740 2 8) 国家 863青年基金项目
关键词 天然气水合物 微观模式 人工地震探测 颗粒接触模式 水合物悬浮模式 胶结模式 gas hydrate micro model rock porosity hydrate concentration velocity estimation
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